SparkFun Electronics Commentsurn:uuid:214d0e4e-f1b1-d287-ce26-ac5b4c9f82492016-12-09T06:34:24-07:00SparkFun Electronicstetsujin on TOL-09314 - Wall Adapter - 5V USBtetsujinurn:uuid:de53c302-7f05-e473-9553-8bacd13d26af2010-05-06T16:12:38-06:00<p>Presumably this adaptor does not contain any actual USB electronics - it&rsquo;s just a power supply&hellip;<br/>
The thing is, electrically, you can hook up a cable to a USB port and just draw 5V at 500mA. But you&rsquo;re not supposed to. USB devices are supposed to connect in a low-power mode and -ask- for that 500mA. Then the computer&rsquo;s USB host software can look at how much power other USB devices have requested and determine whether it&rsquo;s able to provide the amount of power being requested&hellip; So &ldquo;well-behaved&rdquo; devices that charge over USB won&rsquo;t charge unless they are informed, by a USB host, that it&rsquo;s OK to do so. Presumably that&rsquo;s the case with the iPod, too.</p>peterj on TOL-09314 - Wall Adapter - 5V USBpeterjurn:uuid:ea5242dc-4ca6-1fdd-b851-69e7b907b10c2010-04-02T08:43:27-06:00<p>Is this power supply suitable for driving the arduino, an adafruit motor shield (external supply), and a single Sharp IR sensor?</p>Jimb0 on TOL-09314 - Wall Adapter - 5V USBJimb0urn:uuid:144c11c0-923e-1e4b-72e5-4155467b49862009-12-22T10:23:35-07:00<p>I&rsquo;m really sorry to hear about that, GBR2. Email us and we can set you up for a refund or replacement.<br/>
-techsupport at sparkfun dot com</p>GBR2 on TOL-09314 - Wall Adapter - 5V USBGBR2urn:uuid:d9d5a107-560f-6475-759f-da45cf029c5c2009-12-22T10:08:25-07:00<p>I just got 2 of these. One was DOA and the other died about 20 seconds after it was plugged in. While it was working I tried to run a small USB device that draws 100ma typically, and the supply wouldn&rsquo;t do it. Green light came on and then it died. Other stuff I&rsquo;ve bought from Sparkfun, including other power supplies, has all been fine. This item though is total garbage and they should stock something else.</p>ArbyNav on TOL-09314 - Wall Adapter - 5V USBArbyNavurn:uuid:a09704eb-789b-e3c0-41de-29c32911245f2009-09-19T16:39:23-06:00<p>One arrived today, used it to try to charge a Kindle and a Verizon Dare cell phone. Green light comes on for both. Kindle was totally discharged, when plugged into this it keeps trying to reboot (automatically), then it&rsquo;s charging light and the green light start blinking together and it shuts down. Either Kindle is drawing over the USB spec or this is having a tough time charging things. Looking at the post on charging an iPod and a couple of others, I&rsquo;m unsure if this can deliver enough current to charge or run USB devices.</p>tve on TOL-09314 - Wall Adapter - 5V USBtveurn:uuid:13c16ffa-7047-b423-73aa-6f10d0dd02932009-08-17T16:26:40-06:00<p>Just bought 10 of these. It doesn&rsquo;t appear that it can actually supply 500mA @ 5V. Probably should be speced more like 100mA @ 5V.. too bad. Nice little form factor.</p>Bernman on TOL-09314 - Wall Adapter - 5V USBBernmanurn:uuid:a8e8a3e5-f0a4-8ce4-697a-6dd55b68d8a42009-08-11T14:24:03-06:00<p>Does anyone know why this power supply would not charge an iPod? My 120GB iPod classic will not charge when I plug it into this adapter using the Apple provided USB cable. It does charge when plugging that same cable into a computer powered USB port. Any ideas?</p>pelesl on TOL-09314 - Wall Adapter - 5V USBpeleslurn:uuid:e9ac6907-9687-891d-41ae-d46c292bd17c2009-08-06T17:16:23-06:00<p>This thing is total garbage. The &ldquo;regulated&rdquo; output is horribly noisy. It made the project I was working on go totally bonkers (randomly resetting, etc.) Don&rsquo;t expect the 5V to be usable without stepping down.</p>Nate on TOL-09314 - Wall Adapter - 5V USBNateurn:uuid:c31dfe5c-e8c5-a36c-80f9-cd709af877212009-07-30T08:07:16-06:00<p>Robodude is correct. This is a regulated power supply (+/- 0.5V). We just link the to the regulation tutorial to try to show what we mean by &lsquo;regulated&rsquo;.</p>robodude666 on TOL-09314 - Wall Adapter - 5V USBrobodude666urn:uuid:73732e98-58cb-d912-bd50-fa6d490eed6e2009-07-27T12:28:15-06:00<p>Looking at the 3rd picture, you can see the sticker shows it is 5.0v +/- 0.5v and 500mA +/- 30mA. Because this is specifically a USB wall adapter, it will fit within the USB specs which is 5v @ 500mA max.<br/>
SF includes a link to the tutorial from about all products that deal with power.</p>studionebula on TOL-09314 - Wall Adapter - 5V USBstudionebulaurn:uuid:074d445c-f0ce-7b51-d413-1dccb9b2f7212009-07-25T08:23:09-06:00<p>So by linking to your Unregulated Power Supply Tutorial, are you implying that this adapter is unregulated? Or are you implying that this adapter is regulated and thus free of the drawbacks of unregulated supplies?</p>